Why did Chinese believe the Tang struggled with crop failures and government problems?

Question

They had lost the Mandate of Heaven.
They had poor agricultural practices.
They were disorganized and lazy.
They were corrupt and evil men.

Answer 1

The Chinese believed that the Tang struggled with crop failures and government problems because they had lost the Mandate of Heaven. This concept in traditional Chinese political thought stated that rulers were given the right to rule by the gods, but they could lose this right if they ruled unjustly or if natural disasters occurred under their rule. Therefore, the crop failures and government problems were seen as signs that the Tang rulers had lost the support of the gods and were no longer fit to govern.